40251805 has 8 divisors (see below), whose sum is σ = 52693344. Its totient is φ = 29274000.

The previous prime is 40251803. The next prime is 40251829. The reversal of 40251805 is 50815204.

40251805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40251805 - 2¹ = 40251803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40251805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40251803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365871 + ... + 365980.

It is an arithmetic number, because the mean of its divisors is an integer number (6586668).

Almost surely, 2^40251805 is an apocalyptic number.

It is an amenable number.

40251805 is a deficient number, since it is larger than the sum of its proper divisors (12441539).

40251805 is a wasteful number, since it uses less digits than its factorization.

40251805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731867.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 40251805 is about 6344.4310225583. The cubic root of 40251805 is about 342.7113228696.

The spelling of 40251805 in words is "forty million, two hundred fifty-one thousand, eight hundred five".